#ifndef DESONE_H
#define DESONE_H
// des_one.h: interface for the des_one class.
//
//////////////////////////////////////////////////////////////////////

#define     ENCRYPT     1
#define     DECRYPT     0

typedef unsigned char uint8_t;
/* 16位子密钥 */
static bool SubKey[16][48];

// 64位经过PC1转换为56位 (PC-1)
const static char PC1_Table[56] =
{
    57, 49, 41, 33, 25, 17,  9,
     1, 58, 50, 42, 34, 26, 18,
    10,  2, 59, 51, 43, 35, 27,
    19, 11,  3, 60, 52, 44, 36,
    63, 55, 47, 39, 31, 23, 15,
     7, 62, 54, 46, 38, 30, 22,
    14,  6, 61, 53, 45, 37, 29,
    21, 13,  5, 28, 20, 12,  4
};

// 左移
const static char LOOP_Table[16] =
{
    1, 1, 2, 2, 2, 2, 2, 2,
    1, 2, 2, 2, 2, 2, 2, 1
};

// 排列选择 2 (PC-2)
const static char PC2_Table[48] =
{
    14, 17, 11, 24,   1,   5,
    3,  28, 15,  6,  21,  10,
    23, 19, 12,  4,  26,   8,
    16,  7, 27, 20,  13,   2,
    41, 52, 31, 37,  47,  55,
    30, 40, 51, 45,  33,  48,
    44, 49, 39, 56,  34,  53,
    46, 42, 50, 36,  29,  32
};

// Ri_1（32位）经过变换E后膨胀为48位 (E)  void F_func
static const char E_Table[48] =
{
    32,   1,   2,   3,   4,   5,
    4,   5,   6,   7,   8,   9,
    8,   9,  10,  11,  12,  13,
    12,  13,  14,  15,  16,  17,
    16,  17,  18,  19,  20,  21,
    20,  21,  22,  23,  24,  25,
    24,  25,  26,  27,  28,  29,
    28,  29,  30,  31,  32,   1
};

// 8个4比特合并为32比特的排列 P
const static char P_Table[32] =
{
    16,  7, 20, 21,
    29, 12, 28, 17,
     1, 15, 23, 26,
     5, 18, 31, 10,
     2,  8, 24, 14,
    32, 27,  3,  9,
    19, 13, 30,  6,
    22, 11,  4, 25,
};

// 经过S盒 S-boxes
const static char S_Box[8][4][16] =
{
  {
    // S1
    {  14,  4, 13,  1,  2, 15, 11,  8,  3, 10,  6, 12,  5,  9,  0,  7   },
    {   0, 15,  7,  4, 14,  2, 13,  1, 10,  6, 12, 11,  9,  5,  3,  8   },
    {   4,  1, 14,  8, 13,  6,  2, 11, 15, 12,  9,  7,  3, 10,  5,  0   },
    {  15, 12,  8,  2,  4,  9,  1,  7,  5, 11,  3, 14, 10,  0,  6, 13   }
  },
  {
    // S2
    {  15,  1,  8, 14,  6, 11,  3,  4,  9,  7,  2, 13, 12,  0,  5, 10   },
    {   3, 13,  4,  7, 15,  2,  8, 14, 12,  0,  1, 10,  6,  9, 11,  5   },
    {   0, 14,  7, 11, 10,  4, 13,  1,  5,  8, 12,  6,  9,  3,  2, 15   },
    {  13,  8, 10,  1,  3, 15,  4,  2, 11,  6,  7, 12,  0,  5, 14,  9   }
  },
  {
    // S3
    {  10,  0,  9, 14,  6,  3, 15,  5,  1, 13, 12,  7, 11,  4,  2,  8   },
    {  13,  7,  0,  9,  3,  4,  6, 10,  2,  8,  5, 14, 12, 11, 15,  1   },
    {  13,  6,  4,  9,  8, 15,  3,  0, 11,  1,  2, 12,  5, 10, 14,  7   },
    {   1, 10, 13,  0,  6,  9,  8,  7,  4, 15, 14,  3, 11,  5,  2, 12   }
  },
  {
    // S4
    {   7, 13, 14,  3,  0,  6,  9, 10,  1,  2,  8,  5, 11, 12,  4, 15   },
    {  13,  8, 11,  5,  6, 15,  0,  3,  4,  7,  2, 12,  1, 10, 14,  9   },
    {  10,  6,  9,  0, 12, 11,  7, 13, 15,  1,  3, 14,  5,  2,  8,  4   },
    {   3, 15,  0,  6, 10,  1, 13,  8,  9,  4,  5, 11, 12,  7,  2, 14   }
  },
  {
    // S5
    {   2, 12,  4,  1,  7, 10, 11,  6,  8,  5,  3, 15, 13,  0, 14,  9   },
    {  14, 11,  2, 12,  4,  7, 13,  1,  5,  0, 15, 10,  3,  9,  8,  6   },
    {   4,  2,  1, 11, 10, 13,  7,  8, 15,  9, 12,  5,  6,  3,  0, 14   },
    {  11,  8, 12,  7,  1, 14,  2, 13,  6, 15,  0,  9, 10,  4,  5,  3   }
  },
  {
    // S6
    {  12,  1, 10, 15,  9,  2,  6,  8,  0, 13,  3,  4, 14,  7,  5, 11   },
    {  10, 15,  4,  2,  7, 12,  9,  5,  6,  1, 13, 14,  0, 11,  3,  8   },
    {   9, 14, 15,  5,  2,  8, 12,  3,  7,  0,  4, 10,  1, 13, 11,  6   },
    {   4,  3,  2, 12,  9,  5, 15, 10, 11, 14,  1,  7,  6,  0,  8, 13   }
  },
  {
    // S7
    {   4, 11,  2, 14, 15,  0,  8, 13,  3, 12,  9,  7,  5, 10,  6,  1   },
    {  13,  0, 11,  7,  4,  9,  1, 10, 14,  3,  5, 12,  2, 15,  8,  6   },
    {   1,  4, 11, 13, 12,  3,  7, 14, 10, 15,  6,  8,  0,  5,  9,  2   },
    {   6, 11, 13,  8,  1,  4, 10,  7,  9,  5,  0, 15, 14,  2,  3, 12   }
  },
  {
    // S8
    {  13,  2,  8,  4,  6, 15, 11,  1, 10,  9,  3, 14,  5,  0, 12,  7   },
    {   1, 15, 13,  8, 10,  3,  7,  4, 12,  5,  6, 11,  0, 14,  9,  2   },
    {   7, 11,  4,  1,  9, 12, 14,  2,  0,  6, 10, 13, 15,  3,  5,  8   },
    {   2,  1, 14,  7,  4, 10,  8, 13, 15, 12,  9,  0,  3,  5,  6, 11   }
  }
};

// 初始排列 (IP)
const static char IP_Table[64] =
{
    58, 50, 42, 34, 26, 18, 10, 2,
    60, 52, 44, 36, 28, 20, 12, 4,
    62, 54, 46, 38, 30, 22, 14, 6,
    64, 56, 48, 40, 32, 24, 16, 8,
    57, 49, 41, 33, 25, 17,  9, 1,
    59, 51, 43, 35, 27, 19, 11, 3,
    61, 53, 45, 37, 29, 21, 13, 5,
    63, 55, 47, 39, 31, 23, 15, 7
};

// L16与R16合并后经过IP_1的最终排列 (IP**-1)
const static char IPR_Table[64] =
{
    40, 8, 48, 16, 56, 24, 64, 32,
    39, 7, 47, 15, 55, 23, 63, 31,
    38, 6, 46, 14, 54, 22, 62, 30,
    37, 5, 45, 13, 53, 21, 61, 29,
    36, 4, 44, 12, 52, 20, 60, 28,
    35, 3, 43, 11, 51, 19, 59, 27,
    34, 2, 42, 10, 50, 18, 58, 26,
    33, 1, 41,  9, 49, 17, 57, 25
};


class des_one
{
public:
    void Des_SetKey(uint8_t Key[8]); /*生成子密钥*/
    void Des_Run(uint8_t *Out, uint8_t *In, bool Type);/*des加密和解密*/
    des_one();
    virtual ~des_one();

private:

    void F_func(bool In[32], const bool Ki[48]);/*将32比特的输入再转化为32比特的输出*/
    void S_func(bool Out[32], const bool In[48]);/**/
    void Transform(bool *Out, bool *In, const char *Table, int len);
    void Xor(bool *InA, const bool *InB, int len);
    void RotateL(bool *In, int len, int loop);
    void ByteToBit(bool *Out, const char *In, int bits);
    void BitToByte(char *Out, const bool *In, int bits);

};
#endif // DESONE_H
